Sharpener for beveled-edge tools



April 16, 194s. ;v. L. R J$E 2398560 SHARPENER FOR BEVELED EDGE TOOLS Filed Oct. 26, 1944 ATTORNEYS Patented Apr. 16, 1946 ,jsHAitPENEn FOR B vELED-EnGETooLsQ l Vernon Rose, Sacramento, Calif. I H Application October26, 1944, serialnmscoaoe: [I

I "2 Claims. (cum- 32.2)

This invention relates broadly to the tool sharpening art, and is specifically directed to a new and improved sharpening device for any single bevel edge bladed tool including, among others, scissors, shears, knives, plane blade and power tool blades. The term single bevel edge blade as herein used refers to a blade that is sharpened on one side only, the opposite side being smooth, usually fiat.

The object of the invention is to produce a sharpener which will effectively function to sharpen the beveled edge of the tool while positively and efficiently removing the roughened back edge orburrs produced by the sharpening element such as a file; and performing these operations without impairing the set of the tool.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawing similar characters of reference indicate corresponding parts in the several views:

Figure 1 is a side elevation of my improved sharpener.

Figure 2 is a similar view to that of Fig. 1 but showing the metallic shell of the tool and a scissors blade in section and indicating the position assumed by the blade during the sharpening operation.

Figure 3 is a, sectional view taken on a line 3-3 of Fig. 1.

Figure 4 is a perspective view of the blank from which the metallic shell of the sharpener is'made and indicating how it is blanked out to form the novel sharpening slot forming one of the primary conceptions of m invention.

Figure 5 is a sectional view of the metallic shell after it has been formed ready for assembly onto the body of the sharpener.

Figure 6 is a perspective view of the sharpening element, in this instance, a small file.

Referring now particularly to the characters of reference on the drawing, the sharpener comprises a substantially rectangular body I having a handle 2, these elements being preferably made of a selected grade of wood.

Cut into the body I is a notch N. One side 3 of this notch is disposed at substantially right angles to the adjacent plane surface of the body I. The other side 4 lies at an acute angle to the side 3 and is spaced from the bottom edge thereof and extends past such edge to form a slot 5 in the body I.

A substantially rectangular metallic shell S fits over the body I. This shell is formed from a sheet of metal as shown in Fig. 4. Before being shaped to fit over the body, a lip L is blanked out therefrom to form an opening to register with the notch N when the shell is in position on the body I.

The lip L is bent first at right angles to the adjacent plane surface of the shell S and then at an acute angle to the right angle portion. These bends are such that when the shell is fitted over the body the right angled portion 6 of the lip rests in direct contact with the rigid face 3 of the notch and the acute angled portion 1 extends around the lower edge of the face 3 and into the slot 5 in direct face contact with the side of said slot which forms a juncture with the face 3.

A sharpening element 8, such as a selected type of file piece, is fitted on the face 4 and held in place by the shell. This element 8 projects into the slot 5 with its outer face in close contact with the surface I of the lip L.

By reason of the fact that the lip L forms a continuous surface over the rigid face 3 of the notch and around into the upper portion of the slot 5 and against the rigid top face thereof, and the element 8 lies closely against the portion of the lip in the slot, there is no possibility of a break in the rigid metallic contact between the back edge of the blade 9 being sharpened, and the metal surface of the lip. This insures a positive and constant wearing away of the burrs on the bottom edge of the blade 9 as the sharpening process is carried on. This has not been possible with other sharpeners of this type.

The width of the body must also be determined so that the foregoing action will be assured without impairing the set of the blade.

I claim: I

1. In a sharpener of the character described the combination of a rigid body which is substantially rectangular in cross section, the body having a notch intermediate its ends, the notch including two sides, one side being disposed at sub stantially right angles to one plane surface of the body, and the other side being disposed at an acute angle to the first side and being in a plane spaced from the bottom edge of the first side and extending past said bottom edge to form a slot in the body beyond the juncture of the two sides, a substantially rectangular shell encompassing the body, such shell having a portion blanked out to form an opening into the notch in the body, the blanked out portion forming a lip, said lip being bent to a position to fit over the first named side of the notch and about the lower edge thereof and into said slot against the side of the slot which forms a juncture with the said first named face of the notch, a substantially rectangular harpening element fitted and held to the inclined face of the notch and extending into the slot and inface contact with that portion of the lipwhich lies in said slot. 7 v V 2. A sharpener comprising a handle, a solid rigid body projecting forwardly from the handle and being substantially rectangular in cross section, a notch cut into the solid body at a point intermediate its ends, one side of the notch ex tending into the body at substantially right angles to one plane surface of the body; the other side of the notch extending into the body at an -acute angle to the front side, the body'beingcut out a part of the blanked out portion of the shell forming a lip which extends over and against the first named side of the notch in the'body and against the sharpening element, the sides of the shell ad'giacent the shell notch extending above the plane of the bottom of the slot and the inclined side of 'the body notch and functioning to fholdl-the sharpening element in position in said slot and bod notch.

VERNON L. ROSE. 

